I looked up Waluigi.com on a domain registry...Huh, so I just checked out of curiousity and Waluigi.com (which used to be Waluigi's home page and most recently redirected to the game page for 1-2-Switch) no longer goes to anything and just infinitely loads. Don't know how new of a change this was, if it was intentional or not or if it was just this URL.
It was updated 2 HOURS AGO TODAY.
All I can say is pog responsibly.
EDIT: possible false alarm. WhoIs search states it was last updated last year, however ICANN states it was updated "from Registry RDAP DB" today. I should note "RDAP DB" is described as a "successor to the WhoIs protocol" so I'd say it's more trustworthy.
SECOND EDIT: after further research it seems waluigi.com has been blanked out. A HTML Source Code viewer shows https://www.waluigi.com to have no code whatsoever. I checked in case the code would show a redirect to a page that hasn't yet been published that could give us more context behind the edit, but it doesn't.